Start with an agent

Sign up at app.cards.fast. Connect an agent. Cards land in Inbox. Keep the ones you want. Then study.

One server: https://app.cards.fast/mcp.

ChatGPT, Claude, and Grok sign in with your account. Grok Bot, Cursor, Claude Code, and the CLI can use a token from Settings.

ChatGPT (web)

OpenAI says custom MCP is web only. Use chatgpt.com. There is no iPhone flow.

1. Make an account on app.cards.fast if you need one.
2. In ChatGPT: Settings → Security and login → Developer mode.
3. Add the server at chatgpt.com/plugins.
4. URL: https://app.cards.fast/mcp
5. Choose OAuth. Sign in to Cards.Fast. Allow it. Do not use a token.
6. Turn the connector on in a chat. Ask it to write cards. They show up in Inbox.

If OAuth fails, write support@cards.fast.

Claude (web, then the phone)

Add it on claude.ai. Anthropic says web and Desktop are the main path for custom connectors.

1. Account on app.cards.fast if you need one.
2. Customize → Connectors → Add custom connector.
3. URL: https://app.cards.fast/mcp
4. Leave client id and secret blank unless we publish them later.
5. Add. Sign in. Allow it.
6. In a chat: + → Connectors.

Then open the same Claude account on your phone. If the iOS or Android app cannot use a custom MCP, stay on the web.

Claude Code uses a token. That is below.

Grok (web)

Add it at grok.com/connectors. xAI does not document an iPhone add flow. Do not hunt for one.

1. Account on app.cards.fast if you need one.
2. New Connector → Custom.
3. URL: https://app.cards.fast/mcp
4. Sign in to Cards.Fast when Grok asks.

Then ask Grok to write cards. Inbox. If the Grok phone app cannot use custom MCP, stay on the web.

A token instead

Settings → generate a personal token. Shown once. 90 days. One live token. Regenerating stops cards login. Treat it like a password.

https://app.cards.fast/mcp
Authorization: Bearer YOUR_TOKEN

Grok Bot, Cursor, Claude Code, and the CLI use this.

CLI

cards login --host https://app.cards.fast

Cursor

{
  "mcpServers": {
    "cards.fast": {
      "url": "https://app.cards.fast/mcp",
      "headers": {
        "Authorization": "Bearer YOUR_TOKEN"
      }
    }
  }
}

Claude Code

claude mcp add --transport http cards.fast https://app.cards.fast/mcp --header "Authorization: Bearer YOUR_TOKEN"

What to ask

Write atomic cards from this. One fact per card. Standalone questions. Short answers. Put them in my inbox.

The rules are How to write a card. Copy from Prompts.

Then open Inbox. Then Today.

One deck and a hundred cards are free. Individual is $5 a month or $36 a year. Family is $10 a month or $60 a year for four seats. Pricing. Questions: support@cards.fast.